Far-Infrared Synchrotron Spectroscopy of a Potentially Important Interstellar Isotopologue of Vinyl Alcohol: CH 2 CHOD
Far-Infrared Synchrotron Spectroscopy of a Potentially Important Interstellar Isotopologue of Vinyl Alcohol: CH 2 CHOD
复制标题
潜在重要的乙烯醇星际同位素体的远红外同步加速器光谱：CH 2 CHOD
DOI：
10.1021/acs.jpca.9b11514
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Raston, Paul L.
中科院分区：
文献类型：
--
作者：
Bunn, Hayley;Hull, Killian;Miller, Isaac;Raston, Paul L.
本文报道了天体物理上重要分子乙烯醇的远红外光谱（100-500 cm ~（-1））。我们观察到几个低能（OD）扭转带：同旋异构体的基本和前两个热带以及（高能）反旋异构体的基本和第一个热带。虽然对应于反旋异构体的谱带被水的旋转谱线所掩盖（使得在这个阶段无法进行完整的光谱分析），但苯乙烯-乙烯醇谱带不是，并且进行了全局拟合，其中包括4404条在这项工作中分配的不同红外线，以及59条先前报道的微波线。这种同时分析的扭转基本，扭转热带，和纯旋转带ofsyn-vinyl alcohol允许在前两个扭转激发态的光谱参数的测定和细化他们在基态。这些参数应该是有用的搜索冷和温暖的CH 2CHOD在星际分子云。
The far-infrared spectrum (100–500 cm–1) of ad1isotopologue of the astrophysically important molecule, vinyl alcohol, is reported. We observed several low energy (OD) torsional bands: the fundamental and first two hot bands of thesynrotamer and the fundamental and first hot band of the (higher energy)antirotamer. While the bands corresponding to theantirotamer are somewhat obscured by rotational lines of water (making a full spectroscopic analysis unfeasible at this stage), thesyn-vinyl alcohol bands are not, and a global fit was performed that included 4404 distinct infrared lines assigned in this work, in addition to 59 previously reported microwave lines. This simultaneous analysis of the torsional fundamental, torsional hot band, and pure rotational band ofsyn-vinyl alcohol allowed for determination of spectroscopic parameters in the first two torsionally excited states and for refinement of them in the ground state. These parameters should be useful in searches for both cold and warm CH2CHOD in interstellar molecular clouds.